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<tr class="t-nv-h1"><td colspan="5"> 函数</td></tr>
<tr class="t-nv-h2"><td colspan="5"> 字符操作</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/isalnum.html" title="c/string/byte/isalnum"><span class="t-lines"><span>isalnum</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/isalpha.html" title="c/string/byte/isalpha"><span class="t-lines"><span>isalpha</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/islower.html" title="c/string/byte/islower"><span class="t-lines"><span>islower</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/isupper.html" title="c/string/byte/isupper"><span class="t-lines"><span>isupper</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/isdigit.html" title="c/string/byte/isdigit"><span class="t-lines"><span>isdigit</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/isxdigit.html" title="c/string/byte/isxdigit"><span class="t-lines"><span>isxdigit</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/isblank.html" title="c/string/byte/isblank"><span class="t-lines"><span>isblank</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/iscntrl.html" title="c/string/byte/iscntrl"><span class="t-lines"><span>iscntrl</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/isgraph.html" title="c/string/byte/isgraph"><span class="t-lines"><span>isgraph</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/isspace.html" title="c/string/byte/isspace"><span class="t-lines"><span>isspace</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/isprint.html" title="c/string/byte/isprint"><span class="t-lines"><span>isprint</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/ispunct.html" title="c/string/byte/ispunct"><span class="t-lines"><span>ispunct</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/tolower.html" title="c/string/byte/tolower"><span class="t-lines"><span>tolower</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/toupper.html" title="c/string/byte/toupper"><span class="t-lines"><span>toupper</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 转换成数值格式</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/atof.html" title="c/string/byte/atof"><span class="t-lines"><span>atof</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/atoi.html" title="c/string/byte/atoi"><span class="t-lines"><span>atoi</span><span>atol</span><span>atoll</span></span></a></div><div><span class="t-lines"><span></span><span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strtol.html" title="c/string/byte/strtol"><span class="t-lines"><span>strtol</span><span>strtoll</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strtoul.html" title="c/string/byte/strtoul"><span class="t-lines"><span>strtoul</span><span>strtoull</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strtof.html" title="c/string/byte/strtof"><span class="t-lines"><span>strtof</span><span>strtod</span><span>strtold</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strtoimax.html" title="c/string/byte/strtoimax"><span class="t-lines"><span>strtoimax</span><span>strtoumax</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 字符串操作</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strcpy.html" title="c/string/byte/strcpy"><span class="t-lines"><span>strcpy</span><span>strcpy_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strncpy.html" title="c/string/byte/strncpy"><span class="t-lines"><span>strncpy</span><span>strncpy_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strcat.html" title="c/string/byte/strcat"><span class="t-lines"><span>strcat</span><span>strcat_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strncat.html" title="c/string/byte/strncat"><span class="t-lines"><span>strncat</span><span>strncat_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strxfrm.html" title="c/string/byte/strxfrm"><span class="t-lines"><span>strxfrm</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=c/string/byte/strdup&amp;action=edit&amp;redlink=1" class="new" title="c/string/byte/strdup（页面不存在）"><span class="t-lines"><span>strdup</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c2x">(C2x 起)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=c/string/byte/strndup&amp;action=edit&amp;redlink=1" class="new" title="c/string/byte/strndup（页面不存在）"><span class="t-lines"><span>strndup</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c2x">(C2x 起)</span></span></span></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 字符串检验</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strlen.html" title="c/string/byte/strlen"><span class="t-lines"><span>strlen</span><span>strnlen_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strcmp.html" title="c/string/byte/strcmp"><span class="t-lines"><span>strcmp</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strncmp.html" title="c/string/byte/strncmp"><span class="t-lines"><span>strncmp</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strcoll.html" title="c/string/byte/strcoll"><span class="t-lines"><span>strcoll</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strchr.html" title="c/string/byte/strchr"><span class="t-lines"><span>strchr</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strrchr.html" title="c/string/byte/strrchr"><span class="t-lines"><span>strrchr</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strspn.html" title="c/string/byte/strspn"><span class="t-lines"><span>strspn</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strcspn.html" title="c/string/byte/strcspn"><span class="t-lines"><span>strcspn</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strpbrk.html" title="c/string/byte/strpbrk"><span class="t-lines"><span>strpbrk</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strstr.html" title="c/string/byte/strstr"><span class="t-lines"><span>strstr</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strtok.html" title="c/string/byte/strtok"><span class="t-lines"><span>strtok</span><span>strtok_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 内存操作</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/memchr.html" title="c/string/byte/memchr"><span class="t-lines"><span>memchr</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/memcmp.html" title="c/string/byte/memcmp"><span class="t-lines"><span>memcmp</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/memset.html" title="c/string/byte/memset"><span class="t-lines"><span>memset</span><span>memset_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/memcpy.html" title="c/string/byte/memcpy"><span class="t-lines"><span>memcpy</span><span>memcpy_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/memmove.html" title="c/string/byte/memmove"><span class="t-lines"><span>memmove</span><span>memmove_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=c/string/byte/memccpy&amp;action=edit&amp;redlink=1" class="new" title="c/string/byte/memccpy（页面不存在）"><span class="t-lines"><span>memccpy</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c2x">(C2x 起)</span></span></span></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 杂项</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="byte/strerror.html" title="c/string/byte/strerror"><span class="t-lines"><span>strerror</span><span>strerror_s</span><span>strerrorlen_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
</table></div><div></div></div></div></div><div class="t-navbar-sep"> </div></div>
<p>空终止字节字符串（ NTBS ）是尾随零值字节（空终止字符）的非零字节序列。字节字符串中的每个字节都是一些字符集的编码。例如，字符数组 <span class="t-c"><span class="mw-geshi c source-c"><span class="br0">{</span><span class="st0">'<span class="es2">\x63</span>'</span>,<span class="st0">'<span class="es2">\x61</span>'</span>,<span class="st0">'<span class="es2">\x74</span>'</span>,<span class="st0">'<span class="es5">\0</span>'</span><span class="br0">}</span></span></span> 是一个以 ASCII 编码表示字符串 <span class="t-c"><span class="mw-geshi c source-c"><span class="st0">"cat"</span></span></span> 的 NTBS 。
</p>
<h3><span class="mw-headline" id=".E5.87.BD.E6.95.B0">函数</span></h3>
<table class="t-dsc-begin">

<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E5.AD.97.E7.AC.A6.E5.88.86.E7.B1.BB">  字符分类 </span></h5>
</td></tr>

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;ctype.h&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/isalnum.html" title="c/string/byte/isalnum"> <span class="t-lines"><span>isalnum</span></span></a></div></div>
</td>
<td>  检查一个字符是否是字母或数字 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/isalpha.html" title="c/string/byte/isalpha"> <span class="t-lines"><span>isalpha</span></span></a></div></div>
</td>
<td>  检查一个字符是否是英文字母 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/islower.html" title="c/string/byte/islower"> <span class="t-lines"><span>islower</span></span></a></div></div>
</td>
<td>   检查一个字符是否是小写字母 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/isupper.html" title="c/string/byte/isupper"> <span class="t-lines"><span>isupper</span></span></a></div></div>
</td>
<td>   检查一个字符是否是大写字母 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/isdigit.html" title="c/string/byte/isdigit"> <span class="t-lines"><span>isdigit</span></span></a></div></div>
</td>
<td>   检查字符是否为数字 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/isxdigit.html" title="c/string/byte/isxdigit"> <span class="t-lines"><span>isxdigit</span></span></a></div></div>
</td>
<td>   检查一个字符是否是十六进制的字符 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/iscntrl.html" title="c/string/byte/iscntrl"> <span class="t-lines"><span>iscntrl</span></span></a></div></div>
</td>
<td>   检查一个字符是否是控制字符 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/isgraph.html" title="c/string/byte/isgraph"> <span class="t-lines"><span>isgraph</span></span></a></div></div>
</td>
<td>   检查一个字符是否是可显示的字符 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/isspace.html" title="c/string/byte/isspace"> <span class="t-lines"><span>isspace</span></span></a></div></div>
</td>
<td>   检查一个字符是否是空白字符 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/isblank.html" title="c/string/byte/isblank"> <span class="t-lines"><span>isblank</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div>
</td>
<td>   检查一个字符是否是空格字符  <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/isprint.html" title="c/string/byte/isprint"> <span class="t-lines"><span>isprint</span></span></a></div></div>
</td>
<td>  检查一个字符是否是可打印字符 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/ispunct.html" title="c/string/byte/ispunct"> <span class="t-lines"><span>ispunct</span></span></a></div></div>
</td>
<td>   检查一个字符是否是一个标点符号 <br> <span class="t-mark">(函数)</span> </td></tr>


<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E5.AD.97.E7.AC.A6.E6.93.8D.E4.BD.9C">  字符操作 </span></h5>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/tolower.html" title="c/string/byte/tolower"> <span class="t-lines"><span>tolower</span></span></a></div></div>
</td>
<td>   将字符转换成小写 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/toupper.html" title="c/string/byte/toupper"> <span class="t-lines"><span>toupper</span></span></a></div></div>
</td>
<td>   将字符转换成大写 <br> <span class="t-mark">(函数)</span> </td></tr>
</table>
<p>注意：将来可能添加以 <code><b>to</b></code> 或 <code><b>is</b></code> 后随小写字母起始的新增函数到头文件 <code>ctype.h</code> ，故不应于包含该头文件的程序中定义这些函数。
</p>
<table class="wikitable" style="font-size:85%; text-align:center;">

<tr>
<th colspan="2"> ASCII值<br>(十六进制)
</th>
<th> 字符
</th>
<th style="font-size:85%;">
<p><a href="byte/iscntrl.html" title="c/string/byte/iscntrl"><tt>iscntrl</tt></a> <br>
<a href="wide/iswcntrl.html" title="c/string/wide/iswcntrl"><tt>iswcntrl</tt></a>
</p>
</th>
<th style="font-size:85%;">
<p><a href="byte/isprint.html" title="c/string/byte/isprint"><tt>isprint</tt></a> <br>
<a href="wide/iswprint.html" title="c/string/wide/iswprint"><tt>iswprint</tt></a>
</p>
</th>
<th style="font-size:85%;">
<p><a href="byte/isspace.html" title="c/string/byte/isspace"><tt>isspace</tt></a> <br>
<a href="wide/iswspace.html" title="c/string/wide/iswspace"><tt>iswspace</tt></a>
</p>
</th>
<th style="font-size:85%;">
<p><a href="byte/isblank.html" title="c/string/byte/isblank"><tt>isblank</tt></a> <br>
<a href="wide/iswblank.html" title="c/string/wide/iswblank"><tt>iswblank</tt></a>
</p>
</th>
<th style="font-size:85%;">
<p><a href="byte/isgraph.html" title="c/string/byte/isgraph"><tt>isgraph</tt></a> <br>
<a href="wide/iswgraph.html" title="c/string/wide/iswgraph"><tt>iswgraph</tt></a>
</p>
</th>
<th style="font-size:85%;">
<p><a href="byte/ispunct.html" title="c/string/byte/ispunct"><tt>ispunct</tt></a> <br>
<a href="wide/iswpunct.html" title="c/string/wide/iswpunct"><tt>iswpunct</tt></a>
</p>
</th>
<th style="font-size:85%;">
<p><a href="byte/isalnum.html" title="c/string/byte/isalnum"><tt>isalnum</tt></a> <br>
<a href="wide/iswalnum.html" title="c/string/wide/iswalnum"><tt>iswalnum</tt></a>
</p>
</th>
<th style="font-size:85%;">
<p><a href="byte/isalpha.html" title="c/string/byte/isalpha"><tt>isalpha</tt></a> <br>
<a href="wide/iswalpha.html" title="c/string/wide/iswalpha"><tt>iswalpha</tt></a>
</p>
</th>
<th style="font-size:85%;">
<p><a href="byte/isupper.html" title="c/string/byte/isupper"><tt>isupper</tt></a> <br>
<a href="wide/iswupper.html" title="c/string/wide/iswupper"><tt>iswupper</tt></a>
</p>
</th>
<th style="font-size:85%;">
<p><a href="byte/islower.html" title="c/string/byte/islower"><tt>islower</tt></a> <br>
<a href="wide/iswlower.html" title="c/string/wide/iswlower"><tt>iswlower</tt></a>
</p>
</th>
<th style="font-size:85%;">
<p><a href="byte/isdigit.html" title="c/string/byte/isdigit"><tt>isdigit</tt></a> <br>
<a href="wide/iswdigit.html" title="c/string/wide/iswdigit"><tt>iswdigit</tt></a>
</p>
</th>
<th style="font-size:85%;">
<p><a href="byte/isxdigit.html" title="c/string/byte/isxdigit"><tt>isxdigit</tt></a> <br>
<a href="wide/iswxdigit.html" title="c/string/wide/iswxdigit"><tt>iswxdigit</tt></a>
</p>
</th></tr>
<tr>
<td> 0  - 8
</td>
<td> <code>0x00-0x08</code>
</td>
<td> 控制码 (<code>NUL</code>等)
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td></tr>
<tr>
<td> 9
</td>
<td> <code>0x09</code>
</td>
<td> 制表符 (<code>\t</code>)
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td></tr>
<tr>
<td> 10  - 13
</td>
<td> <code>0x0A-0x0D</code>
</td>
<td> 空白符 (<code>\n</code>, <code>\v</code>, <code>\f</code>, <code>\r</code>)
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td></tr>
<tr>
<td> 14 - 31
</td>
<td> <code>0x0E-0x1F</code>
</td>
<td> 控制码
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td></tr>
<tr>
<td> 32
</td>
<td> <code>0x20</code>
</td>
<td> 空格
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td></tr>
<tr>
<td> 33 - 47
</td>
<td> <code>0x21-0x2F</code>
</td>
<td> <code>!"#$%&amp;'()*+,-./</code>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td></tr>
<tr>
<td> 48 - 57
</td>
<td> <code>0x30-0x39</code>
</td>
<td> <code>0123456789</code>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td></tr>
<tr>
<td> 58 - 64
</td>
<td> <code>0x3a-0x40</code>
</td>
<td> <code>:;&lt;=&gt;?@</code>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td></tr>
<tr>
<td> 65 - 70
</td>
<td> <code>0x41-0x46</code>
</td>
<td> <code>ABCDEF</code>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td></tr>
<tr>
<td> 71 - 90
</td>
<td> <code>0x47-0x5A</code>
</td>
<td> <code>GHIJKLMNOPQRSTUVWXYZ</code>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td></tr>
<tr>
<td> 91 - 96
</td>
<td> <code>0x5B-0x60</code>
</td>
<td> <code>[\]^_`</code>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td></tr>
<tr>
<td> 97 -102
</td>
<td> <code>0x61-0x66</code>
</td>
<td> <code>abcdef</code>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td></tr>
<tr>
<td> 103-122
</td>
<td> <code>0x67-0x7A</code>
</td>
<td> <code>ghijklmnopqrstuvwxyz</code>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td></tr>
<tr>
<td> 123-126
</td>
<td> <code>0x7B-0x7E</code>
</td>
<td> <code>{|}~</code>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td></tr>
<tr>
<td> 127
</td>
<td> <code>0x7F</code>
</td>
<td> 退格符 (<code>DEL</code>)
</td>
<td style="background: #90ff90; color: black; vertical-align: middle; text-align: center;" class="table-yes"><b><code>≠0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td>
<td style="background:#ff9090; color:black; vertical-align: middle; text-align: center;" class="table-no"> <b><code>0</code></b>
</td></tr></table>
<table class="t-dsc-begin">


<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E8.BD.AC.E6.8D.A2.E6.88.90.E6.95.B0.E5.80.BC.E6.A0.BC.E5.BC.8F">  转换成数值格式 </span></h5>
</td></tr>

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;stdlib.h&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/atof.html" title="c/string/byte/atof"> <span class="t-lines"><span>atof</span></span></a></div></div>
</td>
<td>   将字节字符串转换成浮点值  <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/atoi.html" title="c/string/byte/atoi"> <span class="t-lines"><span>atoi</span><span>atol</span><span>atoll</span></span></a></div><div><span class="t-lines"><span></span><span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div>
</td>
<td>   将字节字符串转换成整数值 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strtol.html" title="c/string/byte/strtol"> <span class="t-lines"><span>strtol</span><span>strtoll</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div>
</td>
<td>   将字节字符串转换成整数值 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strtoul.html" title="c/string/byte/strtoul"> <span class="t-lines"><span>strtoul</span><span> strtoull</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div>
</td>
<td>   将字节字符串转换成无符号整数值  <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strtof.html" title="c/string/byte/strtof"> <span class="t-lines"><span>strtof</span><span>strtod</span><span>strtold</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div>
</td>
<td>   将字节字符串转换成浮点值 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;inttypes.h&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strtoimax.html" title="c/string/byte/strtoimax"> <span class="t-lines"><span>strtoimax</span><span>strtoumax</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div>
</td>
<td>   将字节字符串转换成 <span class="t-c"><span class="mw-geshi c source-c"><a href="../types/integer.html"><span class="kw118">intmax_t</span></a></span></span>  或 <span class="t-c"><span class="mw-geshi c source-c"><a href="../types/integer.html"><span class="kw132">uintmax_t</span></a></span></span>  <br> <span class="t-mark">(函数)</span> </td></tr>


<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E5.AD.97.E7.AC.A6.E4.B8.B2.E6.93.8D.E4.BD.9C">  字符串操作 </span></h5>
</td></tr>

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;string.h&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strcpy.html" title="c/string/byte/strcpy"> <span class="t-lines"><span>strcpy</span><span>strcpy_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   复制一个字符串给另一个 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strncpy.html" title="c/string/byte/strncpy"> <span class="t-lines"><span>strncpy</span><span>strncpy_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   从一个字符串复制一定数量的字符到另一个 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strcat.html" title="c/string/byte/strcat"> <span class="t-lines"><span>strcat</span><span>strcat_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   连接两个字符串 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strncat.html" title="c/string/byte/strncat"> <span class="t-lines"><span>strncat</span><span>strncat_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   连接两个字符串的一定数量字符 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strxfrm.html" title="c/string/byte/strxfrm"> <span class="t-lines"><span>strxfrm</span></span></a></div></div>
</td>
<td>  变换字符串，使得 strcmp 会产生同 strcoll 的结果 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=c/string/byte/strdup&amp;action=edit&amp;redlink=1" class="new" title="c/string/byte/strdup（页面不存在）"> <span class="t-lines"><span>strdup</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c2x">(C2x 起)</span></span></span></div></div>
</td>
<td>   分配字符串的副本  <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=c/string/byte/strndup&amp;action=edit&amp;redlink=1" class="new" title="c/string/byte/strndup（页面不存在）"> <span class="t-lines"><span>strndup</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c2x">(C2x 起)</span></span></span></div></div>
</td>
<td>   分配拥有指定大小的字符串副本  <br> <span class="t-mark">(函数)</span> </td></tr>


<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E5.AD.97.E7.AC.A6.E4.B8.B2.E6.A3.80.E9.AA.8C">  字符串检验 </span></h5>
</td></tr>

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;string.h&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strlen.html" title="c/string/byte/strlen"> <span class="t-lines"><span>strlen</span><span>strnlen_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   返回给定字符串的长度 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strcmp.html" title="c/string/byte/strcmp"> <span class="t-lines"><span>strcmp</span></span></a></div></div>
</td>
<td>   比较两个字符串 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strncmp.html" title="c/string/byte/strncmp"> <span class="t-lines"><span>strncmp</span></span></a></div></div>
</td>
<td>   比较两个字符串的一定数量字符 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strcoll.html" title="c/string/byte/strcoll"> <span class="t-lines"><span>strcoll</span></span></a></div></div>
</td>
<td>   比较两个字符串，根据当前本地环境 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strchr.html" title="c/string/byte/strchr"> <span class="t-lines"><span>strchr</span></span></a></div></div>
</td>
<td>   查找字符的首次出现 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strrchr.html" title="c/string/byte/strrchr"> <span class="t-lines"><span>strrchr</span></span></a></div></div>
</td>
<td>   查找字符的最后一次出现 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strspn.html" title="c/string/byte/strspn"> <span class="t-lines"><span>strspn</span></span></a></div></div>
</td>
<td>   返回由另一个字符串中的字符分割的最大起始段长度  <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strcspn.html" title="c/string/byte/strcspn"> <span class="t-lines"><span>strcspn</span></span></a></div></div>
</td>
<td>   返回另一个字符串所不具有的字符分割的最大起始段长度  <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strpbrk.html" title="c/string/byte/strpbrk"> <span class="t-lines"><span>strpbrk</span></span></a></div></div>
</td>
<td>   查找一个字符串中的任意一个字符在另一个字符串中的首个位置 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strstr.html" title="c/string/byte/strstr"> <span class="t-lines"><span>strstr</span></span></a></div></div>
</td>
<td>   查找子串字符的首次出现 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strtok.html" title="c/string/byte/strtok"> <span class="t-lines"><span>strtok</span><span>strtok_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   查找字节字符串中的下一个记号 <br> <span class="t-mark">(函数)</span> </td></tr>


<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E5.AD.97.E7.AC.A6.E6.95.B0.E7.BB.84.E6.93.8D.E4.BD.9C">  字符数组操作 </span></h5>
</td></tr>

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;string.h&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/memchr.html" title="c/string/byte/memchr"> <span class="t-lines"><span>memchr</span></span></a></div></div>
</td>
<td>   在数组中搜索字符的首次出现 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/memcmp.html" title="c/string/byte/memcmp"> <span class="t-lines"><span>memcmp</span></span></a></div></div>
</td>
<td>   比较两块缓冲区 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/memset.html" title="c/string/byte/memset"> <span class="t-lines"><span>memset</span><span>memset_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   以字符填充缓冲区 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/memcpy.html" title="c/string/byte/memcpy"> <span class="t-lines"><span>memcpy</span><span>memcpy_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   将一个缓冲区复制到另一个 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/memmove.html" title="c/string/byte/memmove"> <span class="t-lines"><span>memmove</span><span>memmove_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   将一个缓冲区移动到另一个 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=c/string/byte/memccpy&amp;action=edit&amp;redlink=1" class="new" title="c/string/byte/memccpy（页面不存在）"> <span class="t-lines"><span>memccpy</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c2x">(C2x 起)</span></span></span></div></div>
</td>
<td>   复制一个缓冲区到另一个，在指定的分隔符后停止  <br> <span class="t-mark">(函数)</span> </td></tr>


<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E6.9D.82.E9.A1.B9">  杂项 </span></h5>
</td></tr>

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;string.h&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="byte/strerror.html" title="c/string/byte/strerror"> <span class="t-lines"><span>strerror</span><span>strerror_s</span><span>strerrorlen_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   返回给定错误码的文本版本 <br> <span class="t-mark">(函数)</span> </td></tr>
</table>
<h3><span class="mw-headline" id=".E5.BC.95.E7.94.A8">引用</span></h3>
<div class="t-ref-std-11">
<ul><li> C11 standard (ISO/IEC 9899:2011): 
</li></ul>
<dl><dd><ul><li> 7.4 Character handling &lt;ctype.h&gt; (p: 200-204)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.8 Format conversion of integer types &lt;inttypes.h&gt; (p: 217-220)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.22 General utilities &lt;stdlib.h&gt; (p: 340-360)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.24 String handling &lt;string.h&gt; (p: 362-372)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.31.2 Character handling &lt;ctype.h&gt; (p: 455)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.31.5 Format conversion of integer types &lt;inttypes.h&gt; (p: 455)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.31.12 General utilities &lt;stdlib.h&gt; (p: 456)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.31.13 String handling &lt;string.h&gt; (p: 456)
</li></ul>
</dd></dl>
<dl><dd><ul><li> K.3.6 General utilities &lt;stdlib.h&gt; (p: 604=613)
</li></ul>
</dd></dl>
<dl><dd><ul><li> K.3.7 String handling &lt;string.h&gt; (p: 614-623)
</li></ul>
</dd></dl>
<div class="t-ref-std-c99">
<ul><li> C99 standard (ISO/IEC 9899:1999): 
</li></ul>
<dl><dd><ul><li> 7.4 Character handling &lt;ctype.h&gt; (p: 181-185)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.8 Format conversion of integer types &lt;inttypes.h&gt; (p: 198-201)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.20 General utilities &lt;stdlib.h&gt; (p: 306-324)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.21 String handling &lt;string.h&gt; (p: 325-334)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.26.2 Character handling &lt;ctype.h&gt; (p: 401)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.26.4 Format conversion of integer types &lt;inttypes.h&gt; (p: 401)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.26.10 General utilities &lt;stdlib.h&gt; (p: 402)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.26.11 String handling &lt;string.h&gt; (p: 402)
</li></ul>
</dd></dl>
<div class="t-ref-std-c89">
<ul><li> C89/C90 standard (ISO/IEC 9899:1990): 
</li></ul>
<dl><dd><ul><li> 4.3 CHARACTER HANDLING &lt;ctype.h&gt; 
</li></ul>
</dd></dl>
<dl><dd><ul><li> 4.10 GENERAL UTILITIES &lt;stdlib.h&gt; 
</li></ul>
</dd></dl>
<dl><dd><ul><li> 4.11 STRING HANDLING &lt;string.h&gt; 
</li></ul>
</dd></dl>
<dl><dd><ul><li> 4.13.2 Character handling &lt;ctype.h&gt; 
</li></ul>
</dd></dl>
<dl><dd><ul><li> 4.13.7 General utilities &lt;stdlib.h&gt; 
</li></ul>
</dd></dl>
<dl><dd><ul><li> 4.13.8 String handling &lt;string.h&gt; 
</li></ul>
</dd></dl>
</div>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
<table class="t-dsc-begin">

</table></div>
</div>

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